diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 107 |
1 files changed, 85 insertions, 22 deletions
@@ -116,7 +116,7 @@ void buildReport(int n) { keyboard_report.modifier = 0; - if (n > 0 && n <= 9) + if (n > 0 && n <= 10) keyboard_report.keycode[0] = 29+n; else if (n == 0) keyboard_report.keycode[0] = 39; @@ -138,8 +138,20 @@ void jump_to_bootloader(void) } +#define DEBOUNCE_MAX 100 +uint8_t idle_stable = 42; +uint8_t pulse_stable = 42; +uint16_t idlectr = DEBOUNCE_MAX; +uint16_t pulsectr = DEBOUNCE_MAX; + +uint8_t oldidle = 42; +uint8_t oldpulse = 42; + int main() { + int key_to_send; + int n_pulses = 0; + uchar i, button_release_counter = 0, state = STATE_WAIT; DDRC = 0x38; // LEDs as output @@ -170,48 +182,99 @@ int main() sei(); // Enable interrupts after re-enumeration uint32_t j; - for (uint32_t i = 0; i < 300000; i++) + for (uint32_t i = 0; i < 4000000; i++) { wdt_reset(); // keep the watchdog happy usbPoll(); - if (i % 5000 == 0) - { // button pressed (PB1 at ground voltage) - PORTC ^= LED_GREEN; - // also check if some time has elapsed since last button press - if (state == STATE_WAIT && button_release_counter == 255) - state = STATE_SEND_KEY; - - button_release_counter = 0; // now button needs to be released a while until retrigger - } - - if (button_release_counter < 255) - button_release_counter++; // increase release counter // characters are sent when messageState == STATE_SEND and after receiving // the initial LED state from PC (good way to wait until device is recognized) + + int idle = (PINB & 0x10); + int pulse = (PINB & 0x20); - if (state == STATE_WAIT) - j++; + if (idle != idle_stable) + { + idlectr++; + if (idlectr > DEBOUNCE_MAX) + idle_stable = idle; + } + else + idlectr=0; + + if (pulse != pulse_stable) + { + pulsectr++; + if (pulsectr > DEBOUNCE_MAX) + pulse_stable = pulse; + } + else + pulsectr=0; - if (PINB & 0x20) + if (pulse_stable) PORTC &= ~LED_RED; else - PORTC |= LED_RED; + PORTC |= LED_RED; - if (PINB & 0x10) + if (idle_stable) PORTC |= LED_GREEN; else PORTC &= ~LED_GREEN; +/* if (idle) + PORTC |= LED_GREEN; + else + PORTC &= ~LED_GREEN; */ + + if (oldidle == 42) // init + { + oldidle = idle_stable; + oldpulse = pulse_stable; + } + + if (oldidle && !idle_stable) + n_pulses = 0; + + if (!oldidle == 0 && idle_stable) + { + if (n_pulses > 17) + jump_to_bootloader(); + + // also check if some time has elapsed since last button press + if (state == STATE_WAIT && button_release_counter == 255) + { + state = STATE_SEND_KEY; + key_to_send = n_pulses; + } + + button_release_counter = 0; // now button needs to be released a while until retrigger + + } + + if (!oldpulse && pulse_stable) + n_pulses++; + + oldidle = idle_stable; + oldpulse = pulse_stable; + + + if (button_release_counter < 255) + button_release_counter++; // increase release counter + + + if (usbInterruptIsReady() && state != STATE_WAIT && LED_state != 0xff) { switch (state) { case STATE_SEND_KEY: - buildReport(2); - state = STATE_RELEASE_KEY; // release next - PORTC &= ~LED_BLUE; + if (key_to_send>=1 && key_to_send <=10) + { + buildReport(key_to_send); + state = STATE_RELEASE_KEY; // release next + PORTC &= ~LED_BLUE; + } break; case STATE_RELEASE_KEY: |